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Home >> Pontiac >> 2002 >> Aztek FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 652 (Cellular Communication System) >> Diagnostic Information & Procedures >> OnStar® Reprogramming >> VCU or VIU Reprogramming
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VCU or VIU Reprogramming

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Important:  The new OnStar® component parts must be installed prior to the reconfiguration of the OnStar® system.

After replacement of the vehicle communication unit (VCU) or vehicle interface unit (VIU), the OnStar® system must be reprogrammed.

  1. Press and hold the Answer/End Button on the OnStar® Button Assembly until the System Status Light goes from solid GREEN to RED and back to GREEN again.
  2. Call the OnStar® Call Center at 1-888-OnStar1, select prompt 1.
  3. Give the operator the Electronic Serial Number (ESN) off the new VCU or the Station ID (STID) number off the VIU.
  4. Move the vehicle outside and let the vehicle run for 10 minutes.
  5. Press the OnStar® Call Center Call button and ask for a "Reconfiguration".
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